Tonga may refer to the Kingdom of Tonga or the African Tonga ethnic groups:
Tonga may also refer to:
- one of several concepts of Polynesian mythology:
- the southwest wind, the last wind to be reined in by Māui
- the Tonga islands now home to the Kingdom of Tonga referred to above, settled by the ancestors of all Polynesians, the Lapita
- the name of the first woman in Tonga
- persons with the surname Tonga:
- Esi Tonga (1988–), Australian Rugby league player, brother of Willie Tonga
- Willie Tonga (1983–), Australian Rugby league player, brother of Esi Tonga
- Tonga Island, New Zealand
- in São Tomé and Príncipe, child of a temporary immigrant
- in India, a horse carriage: see Tonga (carriage)
- village on Nanumanga (Tuvalu): see Tonga (Tuvalu)
- version of Intel's Pentium II microprocessor designed for laptops
- military codename (Operation Tonga) given to an airborne operation during the Battle of Normandy
- the Tonga language (Mon-Khmer) spoken in Thailand and Malaysia
- a village located in Shilluk areas of southern Sudan that housed a Catholic mission station